1. RUBY AND JAPANESE
Makoto Inoue
LRUG December 2010

2. WHO ARE WE
(NORMAL)?

3. WHO ARE WE(TODAY)?

4. ME @ RUBYKAIGI
here
http://image.gihyo.co.jp/assets/images/news/report/01/rubykaigi2010/0003/thumb/TH400_IMG_1253.jpg

5. TOPIC
Basic Japanese
Object Oriented (OO)
Functional
Japanese Programming in Ruby

6. BASIC JAPANESE
Step 1

7. WATASHI HA RUBY GA SUKI DESU
Kanji Katakana Hiragana
Kanji eg: ,
Katakana eg:
Hiragana eg: , ,

8. Hiragana
Katakana
Each Japanese alphabet is a combination of vowels(a,i,u,e,o) and consonants(k,s,t,n,h,m,y,r,w). Total of Hiragana and
Katakana are 46 each. The number of possible Kanji in use in Japan is around 50,000 , though around 2000 ~ 3000 are
in common use.

9. Kanji => Hiragana
Kanji
Hiragana

10. Kanji Kanji => Katakana
Katakana

11. WHAT’S YOUR NAME?
How Japanese
Alphabet interpret Katakana Hiragana Kanji
Makoto makoto
Vivian bibiann
Oliver oriba-
Max makkusu

12. BUILD YOUR OWN
http://kanji-fandom.com/

13. WHY SO MANY WAYS?
Kanji = To import Chinese words
Hiragana = To suit for domestic use
Katakana = To adopt new words

14. WHY SO MANY WAYS?
To import OO & Functional
To suit for Scripting
To adopt New Concepts

15. OBJECT ORIENTED
Step 2

16. JAPANESE & OO
http://satoshi.blogs.com/life/2004/09/post.html

17. ENGLISH (SVO)
I like Ruby
Subject Verb Object

18. (SOV)
Watashi ha Ruby ga Suki desu
Subject Object Verb
I Ruby Like

19. CUI(SVO)

20. GUI(SOV)
http://satoshi.blogs.com/life/2004/09/post.html

21. RUBY
# Procedural
open("box")
open("car")
# OO
Box.new.open
Car.new.open

22. FUNCTIONAL
Step 3

23. Japanese is a politician's language
Makoto Inoue (Me) - 2010

24. POLITICIAN....
does not commit to anything unless
necessary
means different things depending on
context

25. PREPOSITIONS
preposition
noun Grammar
a word governing, and usually preceding, a
noun or pronoun and expressing a relation
to another word or element in the clause,
as in “the man on the platform,” “she
arrived after dinner,” “what did you do it
for you

26. POSTPOSITIONS
postposition
noun Grammar
a word or morpheme placed after the
word it governs, for example -ward in
homeward.

27. POSTPOSITIONS IN JAPANESE
S O
Watashi ha Ruby ga Suki desu(I Ruby Like)
O S
Ruby ga Watashi ha Suki desu(Ruby I Like)
O
Ruby ga Suki desu(Ruby Like)
Postposition is used to decide the role of noun which it supports. This enables you to
change the order of structure very flexibly, chain as many sentence as you like, and
also let you to omit subject.

28. ABUSING POSTPOSITIONS
Don’t Read !!
”
” Confusing, vague, and long
sentence without much point
(Could be powerful)

29. FUNCTIONAL
Lazy evaluation
high order function

30. RUBY
% 10000.times
Enumerable => #<Enumerator: 10000:times>
Arel User.order('users.id DESC').limit(20).includes(:items)
Block File.open("/tmp.txt").each do
|line|
puts line
end

31. JAPANESE PROGRAMMING IN RUBY
RUBY
1.9
https://github.com/makoto/japanize Step 4

32. DEMO
http://screenr.com/F9L

33. GRAMMAR
# -*- encoding: utf-8 -*-
module Japanize
module Grammar
VERBS = {
' ' => :+, # tasu
' ' => :-, # hiku
' ' => :*, # kakeru
' ' => :/, # waru
}
POSTPOSITIONAL_PARTICLES = [' ',' ',' ',' ']
def ; POSTPOSITIONAL_PARTICLES; end
def ; NUMBERS; end
def ; VERBS; end

34. GRAMMAR
# -*- encoding: utf-8 -*-
def parse
@sequence.split('').map do |s|
s.split(/#{ .join("|")}/)
end.flatten.map do |s|
if [s]
[s]
elsif [s[0]]
NumberConverter.convert(s)
end
end
end

35. PARSER
# -*- encoding: utf-8 -*-
describe Parser do
it "must divide a phrase into words" do
Parser.new(" ").
parse.must_equal [1, 2, :+, 4, :*]
end
end

36. GOOGLE TRANSLATION

37. EVALUATOR
describe Evaluator do
it "must calculate all operands" do
Evaluator.new([1, 2, :+, 3 , :* , 1, :-, 2, :/]).
evaluate.must_equal ((((1+2) * 3) - 1 ) / 2)
end
end

38. REVERSE POLISH NOTATION
[1, 2, :+, 3 , :* , 1, :-, 2, :/]
http://en.wikipedia.org/wiki/Reverse_Polish_notation

39. RubiMaVM
RUBY VM ON RUBY
http://jp.rubyist.net/magazine/?0007-YarvManiacs

40. METHOD MISSING
# -*- encoding: utf-8 -*-
def method_missing (*obj)
if [obj[0][0]]
parsed = Parser.new(obj[0].to_s).parse
Evaluator.new(parsed).evaluate
else
super
end
end

42. SO WHAT?
:-)

43. WHY SO MANY WAYS?
To import OO & Functional
To suit for Scripting
To adopt New Concepts

44. MATZ @
SAPPORO RUBY KAIGI
http://regional.rubykaigi.org/sapporo03
”In future, I want Ruby to keep being the light
which brings new concepts and ideas to people.
I also would like people to see such light, add their
own, and spread it to other people.”
http://igarashikuniaki.net/tdiary/20101205.html

45. WHAT CAN YOU DO?
http://www.igvita.com/2010/12/02/concurrency-with-actors-goroutines-ruby/
http://www.pragprog.com/titles/btlang/seven-languages-in-seven-weeks
http://www.rubyinside.com/ruby-refinements-an-overview-of-a-new-proposed-ruby-feature-3978.html
http://rubykaigi.org/2011/en

46. MERRY CHRISTMAS &
HAVE A HAPPY NEW YEAR!!
& !!
hello 2011
http://www.railsonwave.com/assets/2006/12/21/screensaver_1.jpg